In order to make a clap switch, we have to combine the touch sensor(monostable mode of 555 and the transistorized dark sensor circuits. Whenever there is loud sound produced near the electret condenser mic, pin 2 of 555 gets triggered and it switches on the LED D1. The LED remains on for a definite time determined by R1 and C1. We can adjust the sensitivity of the circuit using a variable resistor in place of fixed resistor R5. You can check the circuit with 1K or 10K.
The schematic of clap switch:
You can see the steps for making clap switch on the video given below.
Please check the following video tutorial
If you want to glow a bulb operating at 220V, use the following schematic:
Before you make this project, read carefully about RELAYS: http://www.buildcircuit.com/how-to-use-a-relay/ If you are not confident at making circuits, don’t work with 220V, it can be dangerous and harm you.